Tato transakce je správná.

Because transakce is a feminine singular noun, and tato is the feminine singular nominative form of tento (this).

The demonstrative tento changes to match the gender and case of the noun:

• ten = masculine inanimate / a common dictionary-style form of that/the
• ta / tato = feminine
• to / toto = neuter

So:

• tato transakce = this transaction

In everyday speech, Czech speakers also often use tahle transakce.

Transakce is feminine.

A very common clue is the ending -e or -a for many feminine nouns, though Czech noun gender is not always perfectly predictable from the ending alone. In this case, you can also tell from the agreement in the sentence:

• tato = feminine
• správná = feminine

Both of those words are matching transakce, which confirms that transakce is feminine.

Because adjectives in Czech must agree with the noun they describe in:

• gender
• number
• case

Here, transakce is:

• feminine
• singular
• nominative

So the adjective must also be feminine singular nominative:

• masculine: správný
• feminine: správná
• neuter: správné

So:

• správný dokument = a correct document
• správná transakce = a correct transaction
• správné rozhodnutí = a correct decision

Je is the 3rd person singular form of the verb být (to be).

So here:

• je = is

The full sentence structure is:

• Tato transakce = subject
• je = verb
• správná = predicate adjective

So literally:

• This transaction is correct.

Unlike in Russian, for example, Czech normally does use the present-tense form of to be in this kind of sentence.

Because this is a sentence with to be: X is Y.

The noun transakce is the subject, and správná is a predicate adjective describing it. In Czech, predicate adjectives usually agree with the subject, so they appear in the matching form.

Here both are effectively tied to the same grammatical role:

• transakce = nominative singular feminine
• správná = nominative singular feminine

This is why the adjective looks like it is in the “same kind of form” as the noun it refers to.

No. Czech word order is fairly flexible, although the neutral, most straightforward order is:

• Tato transakce je správná.

You may also hear:

• Tato transakce správná je.
• Správná je tato transakce.

These alternatives usually sound marked, literary, contrastive, or focus-driven.

For a learner, the safest default is:

• Subject + je + adjective
• Tato transakce je správná.

Usually, in normal standard Czech, no.

You should say:

• Tato transakce je správná.

Leaving out je may happen in:

• headlines
• notes
• poetry
• very compressed style

But in ordinary full sentences, keep je.

A rough English-friendly guide:

• Tato ≈ TAH-to
• transakce ≈ TRAN-sak-tse
• je ≈ yeh
• správná ≈ SPRAAV-naa

A few helpful pronunciation points:

• Czech j sounds like English y in yes
• c sounds like ts
• á is a long vowel
• stress in Czech normally falls on the first syllable of each word:
  • TA-to
  • TRAN-sak-ce
  • je
  • SPRÁV-ná

It can mean several related things, depending on context:

• correct
• right
• proper
• appropriate

In this sentence, correct is probably the best translation:

• Tato transakce je správná. = This transaction is correct.

But in another context:

• správná odpověď = the correct answer
• správný člověk = the right person
• správný postup = the proper procedure

So správný / správná / správné is a flexible adjective with a range of meanings around “right/correct/proper.”

Yes, but it changes the meaning slightly.

• tato transakce = this transaction
• ta transakce = usually that transaction, though sometimes it can function more like the transaction depending on context

So if you specifically want this transaction, tato is the better choice.

Also note that in spoken Czech, people often prefer:

• tahle transakce = this transaction

That sounds natural and conversational.

It is in the nominative case.

Why? Because it is the subject of the sentence:

• This transaction is correct.

In Czech, the subject is typically in the nominative.

That is why you get:

• tato transakce

and not some other case form.

The adjective správná is also in nominative because it agrees with the subject in this type of sentence.